Improvement in valves for regenerative hot-blast stoves



J. M. HARTMAN. Valves for Regenerative Hot-Blast Stoves.

Patented July 23', I878.

F'n eofl Fmao d yenim",

W J6- 42m JOHN M. UAR-THAN, OF PHILAIHILPHlA, PENXSYLV.-\NIA.

llilPROVEMENT lN VALVES FOR REGENERATEVE HOT-BLAST STOVES.

specification formingpiu't of Letters Patent No. 266,123, dated July 2:2, 1 7; application filed May 14, 197

.To all whom it may cancer-n Iie it known that I, JOHN M. HARTMAN, of Philadelphia, Iennsylvenia, have invented a new and useful Improvement in Valves for lieg'enerative Hot iast Stoves, which improvement is fully set forth in the iollowing'specification and accompanying drawing.

M y i nvention relates to the use of slide-valves having the body and valvehody face and flanges all cast in one piece, and with cooling passages cast in the body close to the valvefaee, or with acooiingeoil in closeeontact with the valvc-bodyfacc. The slide-Valve is cast hollow, and has an arrangement of pipes for the circulation of water or air within the valve.

The invention further relates to the combination, with the valve-body and sliding valve, of a remove his cap :nntoonnterbalanced hoistin g-gear, whereby the cap of the body which covers the valve can he lifted up with the valve free from the body; also, to the attaclunent of the valve to the shell of the stove, and to the packing of the valve-spindle.

In the drawing, Figure 1 is an elevation of the valve and hoisting-gear. Fig". 2 is a longitudinal section through the valve and compound valve attachment. F i g. 3 is a front elevation of the compound valve attachment. Fig. 4. is a plan of'the some. Fig. is a section through the valvespindle shifting-box.

I cast my valve-body A with the flanges a and valvcbody face a? all in one piece, and introduce a water-coil, a, around the body-in contact with the body-seat and between the flanges a a. The valve B is of castiron and hollow, and is made to slide upon the face a of the valve-body. To the top of the valve is securedatube, U, which passes upward through the cap i) into a socket, U, and thcrcconnnnnicates with an outlet-pipe, g and a flexible tube, g Within this tube is another pipe, 11, terminating near the bottom oi the valve, and connected to the socket (l and the inlet flexible pipe 5 The water or air passes down the inside pipe I: and out between the nnmilarspneo between the pipes.

In the use of valves on regenerati e stoves dllficultyis experienced in obtaining a gland that will notlealc, and yet work (35iSj',ftll(l pol mil; the valve to seat itself properly when the gland is not in line. To accomplish thisrosult,

I make a gland packed with a brasswire ring,

Two flanges, Ia R2, are slipped over the tube 0, and held in contact with the cap D bolts k These flanges are each turned with a conical face inside, by which pressure is ex erted against the ring it and the sliding joint kept always ti ght. Theseiiauges have a small lateral motion or play upon the top of the cap D, which prevents the stem binding and insures the valve fitting accurately against its face. As an additional security I, cast one side of valve b, which is farthest from the face, heavier than the other side. This throws the valve against the opposite side, thereby scraping oil any accumulation of dust upon the face and preventing any leakage of .air.

I also make the face oi: the vglvojvith a ng. 0', ofcoinposition, such as copper and tin, also the face of the body with a similar ring, N, as shown in Fig. 6. This makes the faces less liable to rust and thevalves much more durable.

An arm, L, is secured to the valve-body, car rying" a sheave, M, over which passes achain or wire rope, m, which is secured at one end to the socket lland at the other end passes around the winding-drum N, and terminates in a conntcrl alanee-Weight, 0. By turning the handle a the valve is raised into the cap D, when, it the bolts connecting the cap are removed, the cap will be raised clear from the body A, as shown in Fig. 1, so that the valve and face can be cleaned whenrcqnired. At the bottom of the valve-body i' place a dustvalvc, p, operated by a handle, 12*, for the discharge of dust from the valvechamber.

I n the construction ot'regencrative fire-brick stoves the different connections of air, gas, hotblust, and cleaning doors are attached to the shell or casing separately, causing numerous holes in the shell and brick-work. "hose different connections coming on one side of the stove interfere with thcnlanipulation of the valves. To obviate this, I attach one body piece, it, only to one side ot' the stove, and on. this body piece it, which has different nozzles, I attach the valves and doors. By this arrangement the some opening into the stove answers two purposes.

in the drawings 3,15, and 4, l; is the 001:! pound ziltgn'lnncnt; l., the shell of the stove. The wx-r w'tii'iinl i'n-mn-hos of the atta hbyspring-i valve attached thereto. l When the stove is ment 1% are provided; ii'ith'slide-valvcs, such as have been hereinbeforedeseribed; Thea taehment It is secured to the shell T of the stove, and the valve-body Ato the said attachment, as shown iii-Fig. 2i 7 1 a When the stove is on gas--thati's, burning; gas- -the air enters at r? and burns the gas which is entering theinlet 1' through the slidereversed and blast turned on, this same opening 1- is used to pass 01f the blast through branch 1*, to which is attached a valve similar to that shown on'the opposite side. Then per opening 1' has an inlet-door, r, throli which air is admitted to burn the gas. The lower o'pening r" is used to conduct the gas into the stove, and also for cleaning out the dirt which is removed through the cleaningdoor 1'.

I use a similar compound attachment or nozzle on the chimney side of the stove, and attach thereto one of my slide-valves between the gas-outletand the chimney;

I claim- 1. In hot-blast valves for regenerative firebrick stoves, the valve-body A. cast in one piece with the flanges a a, combined with the water-coil a embraced by said flanges, and adapted to cool the seat portions of the valvevalve, as herein described.

the combination of the hollow slid-ingsfiein f body, substantially as specified.

gggilgin hot-blast valvhs for regenerativeisftoves, aseeemninanos of a body, A, a snaing h l Waive having inlet and outlet cooling pipes,

and a removable cap for the :-,reception ei' the 3. In hot-blastvalves for regenerative stoves one or more adjhstable flat plates, k beveled en gaging-surfaces, as shot pressing a metallic packing-ring, H I the stem by means of spring; b0l t s k sn steii-.. tiaily as specified. i

4. Inhet-blastvalves forregcneraitr new the combination of the casing 'I., is" outlet valve, and an intermediate, attach ht, R, having one or more openings, 3"; 9,-into;the stove, each of which has two orfinbre o enifngs leading therefrom, substantially as Feet 5. The valve-body sliding (lislr valve'ii, and removable cover ,adapted'ivhen said valve is raised to receive the same, combined with a hoist-in and emmterbalancin'g gear, whereby the said valve and valve andeover may readily be removed. from the said valve body, substantially as specified-g JOHN M. 1L

Witnesses:

Enwn. BROWN, Jens F. GaAx'r. 

